:root {
    --pf-ink: #10182b;
    --pf-ink-soft: #3e4962;
    --pf-muted: #667085;
    --pf-navy: #0d1b3f;
    --pf-navy-2: #172858;
    --pf-indigo: #5b5bd6;
    --pf-indigo-dark: #3f3fa9;
    --pf-indigo-soft: #efefff;
    --pf-mint: #bcebdc;
    --pf-mint-dark: #176b5a;
    --pf-amber: #f4bd61;
    --pf-amber-soft: #fff7e7;
    --pf-coral: #f08a72;
    --pf-coral-soft: #fff0ec;
    --pf-paper: #f7f7f3;
    --pf-white: #ffffff;
    --pf-line: #dfe2e9;
    --pf-line-dark: #c9ceda;
    --pf-shadow: 0 24px 70px rgba(13, 27, 63, .09);
    --pf-display: "Manrope", "Noto Sans KR", system-ui, sans-serif;
    --pf-body: "Noto Sans KR", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 96px;
}

body {
    margin: 0;
    overflow-x: hidden;
    color: var(--pf-ink);
    background: var(--pf-paper);
    font-family: var(--pf-body);
    font-size: 17px;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
}

body::selection {
    color: var(--pf-navy);
    background: #d8d7ff;
}

a {
    color: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

.skip-link {
    position: fixed;
    top: -5rem;
    left: 1rem;
    z-index: 10000;
    padding: .75rem 1rem;
    border-radius: .5rem;
    color: var(--pf-navy);
    background: var(--pf-white);
    font-weight: 800;
    box-shadow: var(--pf-shadow);
}

.skip-link:focus {
    top: 1rem;
}

.sticky-header {
    position: relative;
    z-index: 100;
    border-bottom: 1px solid #ececf0;
    background: rgba(255, 255, 255, .98);
}

.pf-shell {
    width: min(1180px, calc(100% - 40px));
    margin-inline: auto;
}

.pf-kicker {
    display: flex;
    align-items: center;
    gap: .65rem;
    margin: 0 0 1rem;
    color: var(--pf-indigo-dark);
    font: 800 .72rem/1 var(--pf-display);
    letter-spacing: .14em;
    text-transform: uppercase;
}

.pf-kicker::before {
    width: 28px;
    height: 2px;
    background: currentColor;
    content: "";
}

.pf-kicker--light {
    color: #c9cbff;
}

.pf-hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    /* Density scale: tools/qa/check_density.py fails a hero taller than 600px
       at 1280 and 800px at 390, and section padding over 64px / 48px. */
    padding: clamp(1.5rem, 3vw, 2.6rem) 0 clamp(1.4rem, 2.6vw, 2.2rem);
    color: var(--pf-white);
    background:
        radial-gradient(circle at 86% 17%, rgba(112, 111, 235, .38), transparent 28%),
        radial-gradient(circle at 15% 90%, rgba(61, 191, 156, .16), transparent 31%),
        linear-gradient(135deg, #081127, var(--pf-navy) 55%, #17244b);
}

.pf-hero::before {
    position: absolute;
    inset: 0;
    z-index: -2;
    opacity: .17;
    background-image:
        linear-gradient(rgba(255, 255, 255, .1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .1) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: linear-gradient(115deg, #000, transparent 88%);
    content: "";
}

.pf-hero::after {
    position: absolute;
    right: -11rem;
    bottom: -15rem;
    z-index: -1;
    width: 38rem;
    height: 38rem;
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: 50%;
    box-shadow: 0 0 0 5rem rgba(255, 255, 255, .018), 0 0 0 10rem rgba(255, 255, 255, .012);
    content: "";
}

.pf-breadcrumb {
    margin: 0 0 2.2rem;
    color: rgba(255, 255, 255, .62);
    font-size: .82rem;
}

.pf-breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem;
    align-items: center;
    margin: 0;
    padding: 0;
    list-style: none;
}

.pf-breadcrumb a {
    text-decoration: none;
}

.pf-breadcrumb a:hover,
.pf-breadcrumb a:focus-visible {
    color: var(--pf-white);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.pf-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(330px, .8fr);
    gap: clamp(3rem, 7vw, 7rem);
    align-items: center;
}

.pf-hero h1 {
    max-width: 900px;
    margin: 0;
    font: 800 clamp(1.9rem, 3.4vw, 3rem)/1.04 var(--pf-display);
    letter-spacing: -.066em;
}

.pf-hero h1 span {
    display: block;
    margin-top: .22em;
    color: #c8c9ff;
    font-size: .62em;
    line-height: 1.17;
    letter-spacing: -.035em;
}

.pf-hero-lead {
    max-width: 750px;
    margin: 2rem 0 0;
    color: rgba(255, 255, 255, .78);
    font-size: clamp(1.06rem, 1.6vw, 1.28rem);
}

.pf-hero-lead strong {
    color: var(--pf-white);
}

.pf-hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: .55rem 1.25rem;
    margin: 2rem 0 0;
    padding: 0;
    color: rgba(255, 255, 255, .61);
    font-size: .78rem;
    list-style: none;
}

.pf-hero-meta li {
    position: relative;
}

.pf-hero-meta li + li::before {
    position: absolute;
    left: -.7rem;
    color: rgba(255, 255, 255, .3);
    content: "·";
}

.pf-architecture {
    position: relative;
    padding: 1.1rem;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 1.35rem;
    background: rgba(255, 255, 255, .055);
    box-shadow: 0 30px 90px rgba(0, 0, 0, .2);
    backdrop-filter: blur(10px);
}

.pf-architecture-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 0 0 1rem;
    color: rgba(255, 255, 255, .64);
    font: 800 .65rem/1 var(--pf-display);
    letter-spacing: .13em;
    text-transform: uppercase;
}

.pf-architecture-label span:last-child {
    color: var(--pf-mint);
}

.pf-architecture ol {
    display: grid;
    gap: .62rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.pf-architecture li {
    display: grid;
    grid-template-columns: 2.1rem 1fr auto;
    gap: .75rem;
    align-items: center;
    min-height: 3.7rem;
    padding: .72rem .85rem;
    border: 1px solid rgba(255, 255, 255, .1);
    border-radius: .85rem;
    background: rgba(4, 12, 31, .4);
}

.pf-architecture b {
    display: grid;
    width: 2.1rem;
    height: 2.1rem;
    place-items: center;
    border-radius: .65rem;
    color: var(--pf-navy);
    background: var(--pf-mint);
    font: 800 .75rem/1 var(--pf-display);
}

.pf-architecture strong {
    font: 800 .9rem/1.25 var(--pf-display);
}

.pf-architecture small {
    color: rgba(255, 255, 255, .48);
    font-size: .65rem;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.pf-architecture li:nth-child(2) b {
    background: #c9c9ff;
}

.pf-architecture li:nth-child(3) b {
    background: #f7cf8d;
}

.pf-architecture li:nth-child(4) b {
    background: #f6aa99;
}

.pf-answer {
    position: relative;
    z-index: 2;
    margin-top: -2.35rem;
}

.pf-answer-inner {
    display: grid;
    grid-template-columns: 190px 1fr;
    gap: 1.7rem;
    padding: clamp(1.6rem, 4vw, 2.7rem);
    border: 1px solid var(--pf-line);
    border-radius: 1.25rem;
    background: var(--pf-white);
    box-shadow: var(--pf-shadow);
}

.pf-answer-label {
    color: var(--pf-indigo-dark);
    font: 800 .74rem/1.4 var(--pf-display);
    letter-spacing: .11em;
    text-transform: uppercase;
}

.pf-answer p {
    max-width: 920px;
    margin: 0;
    color: var(--pf-ink);
    font: 750 clamp(1.2rem, 2.2vw, 1.72rem)/1.47 var(--pf-display);
    letter-spacing: -.025em;
}

.pf-page-grid {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(2.5rem, 6vw, 6rem);
    padding-top: 5rem;
    padding-bottom: 7rem;
}

.pf-toc {
    position: sticky;
    top: 92px;
    align-self: start;
    padding: 1.15rem 0 1.15rem 1rem;
    border-left: 1px solid var(--pf-line-dark);
}

.pf-toc p {
    margin: 0 0 .85rem;
    color: var(--pf-muted);
    font: 800 .68rem/1 var(--pf-display);
    letter-spacing: .12em;
    text-transform: uppercase;
}

.pf-toc a {
    display: block;
    padding: .35rem 0;
    color: var(--pf-muted);
    font-size: .78rem;
    line-height: 1.35;
    text-decoration: none;
}

.pf-toc a:hover,
.pf-toc a:focus-visible {
    color: var(--pf-indigo-dark);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.pf-content {
    min-width: 0;
}

.pf-section {
    padding: 0 0 clamp(1.25rem, 2.2vw, 1.9rem);
}

.pf-section + .pf-section {
    padding-top: clamp(1.25rem, 2.2vw, 1.9rem);
    border-top: 1px solid var(--pf-line);
}

.pf-section-head {
    max-width: 850px;
    margin-bottom: 2.5rem;
}

.pf-section h2 {
    margin: 0;
    color: var(--pf-navy);
    font: 800 clamp(2.05rem, 4.1vw, 3.8rem)/1.08 var(--pf-display);
    letter-spacing: -.05em;
}

.pf-section-head > p:last-child {
    max-width: 780px;
    margin: 1.15rem 0 0;
    color: var(--pf-ink-soft);
    font-size: 1.02rem;
}

.pf-prose {
    max-width: 780px;
}

.pf-prose p {
    margin: 0 0 1.2rem;
    color: var(--pf-ink-soft);
}

.pf-prose strong {
    color: var(--pf-ink);
}

.pf-prose a,
.pf-source-link {
    color: var(--pf-indigo-dark);
    font-weight: 700;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

.pf-prose a:hover,
.pf-prose a:focus-visible,
.pf-source-link:hover,
.pf-source-link:focus-visible {
    color: #24247f;
    text-decoration-thickness: 2px;
}

.pf-stat {
    display: grid;
    grid-template-columns: 115px 1fr;
    gap: 1.3rem;
    align-items: center;
    max-width: 780px;
    margin: 2rem 0;
    padding: 1.35rem;
    border: 1px solid #d8d8f5;
    border-radius: 1rem;
    background: var(--pf-indigo-soft);
}

.pf-stat strong {
    color: var(--pf-indigo-dark);
    font: 800 2.1rem/1 var(--pf-display);
    letter-spacing: -.04em;
}

.pf-stat span {
    color: var(--pf-ink-soft);
    font-size: .9rem;
}

.pf-note {
    max-width: 780px;
    margin: 2rem 0;
    padding: 1.3rem 1.45rem;
    border-left: 4px solid var(--pf-amber);
    border-radius: 0 .85rem .85rem 0;
    background: var(--pf-amber-soft);
}

.pf-note strong {
    display: block;
    margin-bottom: .3rem;
    color: #7b5015;
    font: 800 .78rem/1.3 var(--pf-display);
    letter-spacing: .08em;
    text-transform: uppercase;
}

.pf-note p {
    margin: 0;
    color: #5f4a2c;
    font-size: .9rem;
}

.pf-paradigms {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .85rem;
}

.pf-paradigm {
    position: relative;
    min-height: 250px;
    padding: 1.35rem;
    overflow: hidden;
    border: 1px solid var(--pf-line);
    border-radius: 1rem;
    background: var(--pf-white);
}

.pf-paradigm::after {
    position: absolute;
    right: -2.5rem;
    bottom: -2.5rem;
    width: 6rem;
    height: 6rem;
    border-radius: 50%;
    background: var(--tone, var(--pf-indigo-soft));
    content: "";
}

.pf-paradigm > span {
    color: var(--tone-ink, var(--pf-indigo-dark));
    font: 800 .67rem/1 var(--pf-display);
    letter-spacing: .11em;
    text-transform: uppercase;
}

.pf-paradigm h3 {
    margin: .8rem 0 .65rem;
    color: var(--pf-navy);
    font: 800 1.12rem/1.25 var(--pf-display);
    letter-spacing: -.025em;
}

.pf-paradigm p {
    margin: 0;
    color: var(--pf-muted);
    font-size: .84rem;
}

.pf-paradigm code {
    display: block;
    margin-top: 1rem;
    color: var(--pf-ink-soft);
    font: 700 .73rem/1.45 ui-monospace, SFMono-Regular, Menlo, monospace;
    white-space: normal;
}

.pf-paradigm:nth-child(2) {
    --tone: #e6f7f1;
    --tone-ink: var(--pf-mint-dark);
}

.pf-paradigm:nth-child(3) {
    --tone: #fff1d8;
    --tone-ink: #936016;
}

.pf-paradigm:nth-child(4) {
    --tone: #ffeae5;
    --tone-ink: #a44c37;
}

.pf-paradigm:nth-child(5) {
    --tone: #e8eefc;
    --tone-ink: #34538e;
}

.pf-paradigm:nth-child(6) {
    --tone: #ece8f8;
    --tone-ink: #624b8d;
}

.pf-method-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.pf-method {
    padding: clamp(1.4rem, 3vw, 2rem);
    border: 1px solid var(--pf-line);
    border-radius: 1.1rem;
    background: var(--pf-white);
}

.pf-method--wide {
    grid-column: 1 / -1;
}

.pf-method-top {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    justify-content: space-between;
}

.pf-method-tag {
    color: var(--pf-indigo-dark);
    font: 800 .68rem/1 var(--pf-display);
    letter-spacing: .1em;
    text-transform: uppercase;
}

.pf-method h3 {
    margin: .6rem 0 0;
    color: var(--pf-navy);
    font: 800 clamp(1.25rem, 2.2vw, 1.65rem)/1.23 var(--pf-display);
    letter-spacing: -.03em;
}

.pf-method-top > span:last-child {
    flex: 0 0 auto;
    padding: .35rem .58rem;
    border-radius: 999px;
    color: var(--pf-muted);
    background: #f0f1f4;
    font: 700 .67rem/1 var(--pf-display);
}

.pf-formula {
    margin: 1.2rem 0;
    padding: .85rem 1rem;
    overflow-wrap: anywhere;
    border: 1px dashed var(--pf-line-dark);
    border-radius: .8rem;
    color: var(--pf-indigo-dark);
    background: #fafaff;
    font: 750 .86rem/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.pf-method p {
    margin: 0 0 1rem;
    color: var(--pf-ink-soft);
    font-size: .91rem;
}

.pf-method ul,
.pf-check-list {
    display: grid;
    gap: .55rem;
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
}

.pf-method li,
.pf-check-list li {
    position: relative;
    padding-left: 1.15rem;
    color: var(--pf-muted);
    font-size: .82rem;
}

.pf-method li::before,
.pf-check-list li::before {
    position: absolute;
    top: .65em;
    left: 0;
    width: .36rem;
    height: .36rem;
    border-radius: 50%;
    background: var(--pf-indigo);
    content: "";
}

.pf-seven {
    display: grid;
    grid-template-columns: repeat(7, minmax(92px, 1fr));
    gap: .55rem;
    margin: 1.7rem 0 0;
    padding: 0;
    list-style: none;
}

.pf-seven li {
    min-height: 118px;
    padding: .85rem .72rem;
    border: 1px solid var(--pf-line);
    border-radius: .8rem;
    color: var(--pf-ink-soft);
    background: var(--pf-white);
    font-size: .72rem;
}

.pf-seven b {
    display: block;
    margin-bottom: .55rem;
    color: var(--pf-indigo-dark);
    font: 800 1.15rem/1 var(--pf-display);
}

.pf-reframe-loop {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    gap: .8rem;
    align-items: stretch;
    margin: 1.8rem 0;
}

.pf-reframe-loop div {
    padding: 1.2rem;
    border: 1px solid var(--pf-line);
    border-radius: .9rem;
    background: var(--pf-white);
}

.pf-reframe-loop b {
    display: block;
    margin-bottom: .35rem;
    color: var(--pf-navy);
    font: 800 1rem/1.2 var(--pf-display);
}

.pf-reframe-loop span {
    color: var(--pf-muted);
    font-size: .76rem;
}

.pf-reframe-loop > i {
    align-self: center;
    color: var(--pf-indigo);
    font-style: normal;
    font-weight: 900;
}

.pf-practices {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: .75rem;
    margin: 1.5rem 0 0;
    padding: 0;
    counter-reset: practice;
    list-style: none;
}

.pf-practices li {
    counter-increment: practice;
    display: grid;
    grid-template-columns: 2rem 1fr;
    gap: .7rem;
    align-items: start;
    padding: 1rem;
    border-radius: .8rem;
    color: var(--pf-ink-soft);
    background: #f0f1f5;
    font-size: .82rem;
}

.pf-practices li::before {
    display: grid;
    width: 2rem;
    height: 2rem;
    place-items: center;
    border-radius: .55rem;
    color: var(--pf-white);
    background: var(--pf-navy);
    content: counter(practice, decimal-leading-zero);
    font: 800 .64rem/1 var(--pf-display);
}

.pf-screen-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .7rem;
    margin: 1.5rem 0;
}

.pf-screen-grid div {
    min-height: 126px;
    padding: 1rem;
    border: 1px solid var(--pf-line);
    border-radius: .85rem;
    background: var(--pf-white);
}

.pf-screen-grid b {
    display: block;
    color: var(--pf-navy);
    font: 800 1rem/1.2 var(--pf-display);
}

.pf-screen-grid span {
    display: block;
    margin-top: .4rem;
    color: var(--pf-muted);
    font-size: .75rem;
}

.pf-table-wrap {
    margin: 2rem 0;
    overflow-x: auto;
    border: 1px solid var(--pf-line);
    border-radius: 1rem;
    background: var(--pf-white);
    box-shadow: 0 12px 35px rgba(13, 27, 63, .045);
}

.pf-table {
    width: 100%;
    min-width: 850px;
    border-collapse: collapse;
    font-size: .78rem;
}

.pf-table caption {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.pf-table th,
.pf-table td {
    padding: 1rem;
    vertical-align: top;
    border-bottom: 1px solid var(--pf-line);
    text-align: left;
}

.pf-table th {
    color: var(--pf-white);
    background: var(--pf-navy);
    font: 800 .68rem/1.35 var(--pf-display);
    letter-spacing: .05em;
    text-transform: uppercase;
}

.pf-table tr:last-child td {
    border-bottom: 0;
}

.pf-table tbody tr:nth-child(even) {
    background: #f8f8fb;
}

.pf-table td:first-child {
    color: var(--pf-navy);
    font-weight: 800;
}

.pf-tradeoffs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.pf-tradeoff {
    padding: 1.4rem;
    border-radius: 1rem;
    background: var(--pf-navy);
}

.pf-tradeoff p:first-child {
    margin: 0 0 .8rem;
    color: #c8c9ff;
    font: 800 .72rem/1.3 var(--pf-display);
    letter-spacing: .08em;
    text-transform: uppercase;
}

.pf-tradeoff h3 {
    margin: 0;
    color: var(--pf-white);
    font: 800 1.25rem/1.25 var(--pf-display);
    letter-spacing: -.03em;
}

.pf-tradeoff p:last-child {
    margin: .8rem 0 0;
    color: rgba(255, 255, 255, .68);
    font-size: .82rem;
}

.pf-pipeline {
    position: relative;
    display: grid;
    gap: .8rem;
    margin-top: 2rem;
}

.pf-pipeline::before {
    position: absolute;
    top: 2rem;
    bottom: 2rem;
    left: 1.75rem;
    width: 2px;
    background: linear-gradient(var(--pf-indigo), var(--pf-mint-dark));
    content: "";
}

.pf-phase {
    position: relative;
    display: grid;
    grid-template-columns: 3.5rem 1fr;
    gap: 1rem;
    padding: 1.25rem;
    border: 1px solid var(--pf-line);
    border-radius: 1rem;
    background: var(--pf-white);
}

.pf-phase > b {
    z-index: 1;
    display: grid;
    width: 3.5rem;
    height: 3.5rem;
    place-items: center;
    border-radius: .9rem;
    color: var(--pf-white);
    background: var(--pf-indigo);
    font: 800 .78rem/1 var(--pf-display);
}

.pf-phase:nth-child(2) > b {
    background: #4f78b7;
}

.pf-phase:nth-child(3) > b {
    background: #377f78;
}

.pf-phase:nth-child(4) > b {
    color: var(--pf-navy);
    background: var(--pf-mint);
}

.pf-phase h3 {
    margin: .15rem 0 .4rem;
    color: var(--pf-navy);
    font: 800 1.08rem/1.25 var(--pf-display);
}

.pf-phase p {
    margin: 0;
    color: var(--pf-muted);
    font-size: .82rem;
}

.pf-brief {
    margin-top: 2.5rem;
    padding: clamp(1.4rem, 3vw, 2.1rem);
    border: 1px solid #cfd0f5;
    border-radius: 1.1rem;
    background: linear-gradient(145deg, #f9f9ff, #f2f7f5);
}

.pf-brief h3 {
    margin: 0;
    color: var(--pf-navy);
    font: 800 1.3rem/1.25 var(--pf-display);
    letter-spacing: -.025em;
}

.pf-brief > p {
    margin: .65rem 0 1.3rem;
    color: var(--pf-muted);
    font-size: .86rem;
}

.pf-brief dl {
    display: grid;
    grid-template-columns: 185px 1fr;
    margin: 0;
    border-top: 1px solid var(--pf-line);
}

.pf-brief dt,
.pf-brief dd {
    margin: 0;
    padding: .85rem 0;
    border-bottom: 1px solid var(--pf-line);
}

.pf-brief dt {
    color: var(--pf-navy);
    font: 800 .75rem/1.45 var(--pf-display);
}

.pf-brief dd {
    color: var(--pf-muted);
    font-size: .8rem;
}

.pf-sources {
    display: grid;
    gap: .65rem;
    margin: 0;
    padding: 0;
    list-style: none;
    counter-reset: source;
}

.pf-sources li {
    counter-increment: source;
    display: grid;
    grid-template-columns: 2rem 1fr;
    gap: .7rem;
    align-items: start;
    color: var(--pf-muted);
    font-size: .8rem;
}

.pf-sources li::before {
    color: var(--pf-indigo-dark);
    content: counter(source, decimal-leading-zero);
    font: 800 .68rem/1.7 var(--pf-display);
}

.pf-sources a {
    color: var(--pf-ink-soft);
    font-weight: 700;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

.pf-sources a:hover,
.pf-sources a:focus-visible {
    color: var(--pf-indigo-dark);
}

.pf-related {
    padding: clamp(4rem, 8vw, 6.7rem) 0;
    color: var(--pf-white);
    background: var(--pf-navy);
}

.pf-related h2 {
    margin: 0;
    font: 800 clamp(2rem, 4vw, 3.4rem)/1.08 var(--pf-display);
    letter-spacing: -.045em;
}

.pf-related-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .85rem;
    margin-top: 2rem;
}

.pf-related-card {
    display: flex;
    min-height: 190px;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.35rem;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 1rem;
    background: rgba(255, 255, 255, .055);
    text-decoration: none;
    transition: transform .2s ease, border-color .2s ease, background-color .2s ease;
}

.pf-related-card:hover,
.pf-related-card:focus-visible {
    transform: translateY(-3px);
    border-color: rgba(200, 201, 255, .6);
    background: rgba(255, 255, 255, .09);
}

.pf-related-card small {
    color: #c8c9ff;
    font: 800 .65rem/1 var(--pf-display);
    letter-spacing: .1em;
    text-transform: uppercase;
}

.pf-related-card strong {
    display: block;
    margin-top: .65rem;
    font: 800 1.15rem/1.25 var(--pf-display);
}

.pf-related-card span {
    color: rgba(255, 255, 255, .62);
    font-size: .78rem;
}

.pf-footer {
    padding: 2.5rem 0;
    color: #646f89;
    background: #081127;
    font-size: .75rem;
}

.pf-footer-inner {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
}

.pf-footer a {
    color: #c8c9ff;
    text-underline-offset: 4px;
}

@media (max-width: 1060px) {
    .pf-page-grid {
        grid-template-columns: 1fr;
    }

    .pf-toc {
        position: static;
        display: flex;
        flex-wrap: wrap;
        gap: .25rem .9rem;
        padding: 1rem;
        border: 1px solid var(--pf-line);
        border-radius: .85rem;
        background: var(--pf-white);
    }

    .pf-toc p {
        width: 100%;
        margin-bottom: .35rem;
    }

    .pf-seven {
        grid-template-columns: repeat(4, minmax(100px, 1fr));
    }
}

@media (max-width: 820px) {
    body {
        font-size: 16px;
    }

    .pf-hero-grid {
        grid-template-columns: 1fr;
    }

    .pf-architecture {
        max-width: 540px;
    }

    .pf-answer-inner {
        grid-template-columns: 1fr;
        gap: .65rem;
    }

    .pf-paradigms,
    .pf-screen-grid,
    .pf-related-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .pf-method-grid {
        grid-template-columns: 1fr;
    }

    .pf-method--wide {
        grid-column: auto;
    }

    .pf-seven {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 600px) {
    .pf-shell {
        width: min(100% - 28px, 1180px);
    }

    .pf-hero {
        padding-top: 1.4rem;
    }

    .pf-hero h1 {
        font-size: clamp(1.6rem, 6.6vw, 2.1rem);
    }

    .pf-hero-grid {
        gap: 20px;
    }

    .pf-hero-lead {
        margin-top: 18px;
    }

    .pf-hero-meta {
        margin-top: 18px;
    }

    .pf-architecture small {
        display: none;
    }

    .pf-page-grid {
        gap: 3.5rem;
        padding-top: 4rem;
        padding-bottom: 5rem;
    }

    .pf-paradigms,
    .pf-screen-grid,
    .pf-tradeoffs,
    .pf-related-grid,
    .pf-practices {
        grid-template-columns: 1fr;
    }

    .pf-paradigm {
        min-height: auto;
    }

    .pf-stat {
        grid-template-columns: 1fr;
        gap: .65rem;
    }

    .pf-reframe-loop {
        grid-template-columns: 1fr;
    }

    .pf-reframe-loop > i {
        justify-self: center;
        transform: rotate(90deg);
    }

    .pf-brief dl {
        grid-template-columns: 1fr;
    }

    .pf-brief dt {
        padding-bottom: .15rem;
        border-bottom: 0;
    }

    .pf-brief dd {
        padding-top: 0;
    }

    .pf-footer-inner {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .pf-related-card {
        transition: none;
    }
}

@media print {
    #navBarContainer,
    .pf-toc,
    .pf-related,
    .pf-footer {
        display: none !important;
    }

    body {
        color: #111;
        background: #fff;
        font-size: 11pt;
    }

    .pf-hero {
        padding: 2rem 0;
        color: #111;
        background: #fff;
    }

    .pf-hero h1,
    .pf-hero h1 span,
    .pf-hero-lead,
    .pf-hero-meta,
    .pf-breadcrumb,
    .pf-kicker--light {
        color: #111;
    }

    .pf-architecture {
        display: none;
    }

    .pf-answer {
        margin-top: 0;
    }

    .pf-answer-inner,
    .pf-method,
    .pf-paradigm,
    .pf-table-wrap {
        box-shadow: none;
    }

    .pf-page-grid {
        display: block;
        padding-top: 2rem;
    }

    .pf-section {
        break-inside: avoid;
    }
}